Screw-machine.



P. L. ROBERTSON'.

soREw MACHINE.,

APPLICATION FILED DEO. 27, l910 1,051,915. Patented Feb. 4, 1913,

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P. L. ROBERTSON.

SCREW MACHINE.

APPLIUATION FILED DEG. 27, 19r0.

Patented Feb.r4, 1913.

12 SHEETS-*SHEET 2.

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. L. ROBERTSGN.

SCREW MACHINE,

AP.LicAr1oM M LED EEG. 1910.

Patented Feb. 4, 1913.

l2 SHEETS-SHEET S.

P. L. ROBERTSON. SREW MACHINE,

APPLICATION FILED 15150.27, 1910.

Patented Feb. 4, 1913.

12 SHEETS-SHEET 4.

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HMTEDisfEATEs PATENI OFFICE.

PETER.=LYMBU RNER RoBBrsoN,J 'or MILTON; `NEAR HAMILTON, oN'rABio, CANADA.

SCREW-MACHINE.

A Bpeclcaticn of Letters Patent.

Patented Feb. 4, 1913.

Application tiled. December 27, 1910. Serial No. 699,548.

To'fill'whom'itsmay vconcornfqv g' l* e it' know-n .f I, Lvn'inunxisa Bonsai-sou; of Milton, nearHamilton. Provinceof` Ontario,4 Canada; haveinvented certain new and useful Improvements in Screw- ;\lachines; land I 'dohereby declare that the following is a full; clear; and exact description of the same.

My invention relates to machines of the tvpo adapted to actupon a screw blank after the latter has been formed to the required size, -and'particularly to a machine in which pointing and tlireadiiigof the i shank or body of the blank and shaving of i5 the head thereof are carried out in one machine.

My invention .has for an object to provide amachinc in which the shank of a screw blank may be. threaded and the head thereof shaved simultaneously.

Another object is to provide improved means for shaving the head ofa screw or blank. A

i A further object is to provide improved 2i.; means vfor feeding the blank to and dis- {charging it from, the forming mechanism.

Another object is` to provide improved' means for adjusting lthe threading tool.

Stillanother Objectis to provide a nia- :ioi chine for forming wood screws in which pointing and threadingof the shank of the Iblank and shaving of the head thereof may i be accomplished in thesaino machine.

Other objectsand the advantages of the 115i invention will be apparent to those'skilled im the art from a 4consideration of. the followingdescription and accompanying drawings forming a partjofthis specifica- Ition in which one embodiment of the inven- -l0 tion has 4been described andillustrated and .iu which similarfreference characters indicate the same partsthroughout the .various :views and wherein-f.

'chine constructed ac co'rdinglto my inven-v horizontal' ls'ectionallview taken oniline 4-4 xshaftbeing'shown in elevation' Fig. l is an end elevation .`of4 the lmacliine; Fig. 6 is a detail sectionalj view-showing particularly F'gurel is a planviewofa screw ma-v the means for adjusting the threadingr tool throw; Fig. 7 is a transverse sectional view taken on-line 7-7 Fig. 3; Fig. 8-is a detail face view of parts of the operating mechiv nism for the oscillatory feed arm; Fig. 9 is a detail perspective view of the arm operating the back rest.; Fig. 10' is a detail side elevation of the hopper and the hoist operating means; Fig. 11 is a vertical sectional view'taken on line 11-11 Fig. 10; Fig. 12 'is a detail sectional view of a part of the hoist operating means; Fig. 13 is a detail plan view illustrating a portion of the blank feeding means and the pick out device; Fig. 14 is a vertical sectional view taken on line 141-14 Fig. 13;. Fig. 15 is a detail view showing the mounting of the oscillatory feed arm; Fig. 16 is a longitudinal sectional view of the front port-ion of the chuck or gripping device and end mill; Fig. 17 is a similar view of the rear portion, but taken at right angles to Fig. 1G; Fig. 18 is an enlarged detail section taken on line 18-18 Fig. 17; Figs. 19, 20 21 and 22 are detail views of portions of the clutch operating means; Fig. 23 is a front view of the chuck; Fig. 24 is a. transverse sectional view taken on line Z4-24 Fig. 16; Fig.v9.5 is a detail sectional view of the front end of the end mill. showing also part of the bl'ank and a portion of the gripping jaws; Fig. ZG is a perspective view of the shaving tool or end mill proper: Fig. 27 is av perspective view of the holderfor the shaving tool; Fig. 28 is a perspective view of the collar for varying the inward or diagonal movement 'of the tool;lFig..29 is a perspective view of the adjusting stem for the collar; Fig. 30 is a ing of the end mill operating lever; Fig. 31 isa perspective view illustrating particu- ;larlythe pick out device; Fig. 32 is a de- @tail section showing the connection between the link leading to the pick out slide and the lever operatingthe clutch jaws; Fig. 33 is a perspective view of' one of the operating parts of thepick out device; Fig. 34 is a perspectiveview showing the recessed disk comprising part of the blank feeding mechanism and its operating means; also the point-ing tool and operating means therefor; Fig. 35 is a perspective view of the pointer tool and the means for reciprocating the latter; Fig. 3G is a detail transverse section detail section showing the adjustable mountof y'the cam -which"operates ithe chuck jaws,

and i; Fig` 339Qis, a AdetailV 'inverted' plan -`view;

iofla portion'` ofthe oscillatory yfeed arm opl portedonilegs 2.

.-illiist'iated the blanks Awhich where shown in the,drawings'aree indicated by the-'letter w,

are-'- fed to :the forming-mechanismfrom a suitable hopper 3-(seeparticularly Figs. 10,

' 11 and 12) preferably secured on the upper end ofva standardft adjustably mounted on guides 5 on the bed 'plate 1' to'which latter it issecured by suitable means as the bolts 6 passing through'slots 7 in the base 4" of the standard and through the bed plate and having nuts 8 threaded on their ends. From the hopper the blanks ,are fed to an inclined chute 14.coniiected thereto at its upper end, this'chnte being formed by a pair of verticallyari'anged parallel stri s on the to s of which the head of the blan rests, the ody hanging down therebetween.

'I` ie lanks may'be delivered-to the chute by a suitabledevice as the slotted hoist 15.' In order to obviato any chance of damage to the machine tlirou h the hoist sticking (as might be caused by. ,the blanksin the honper obstruct-ing the movement thereof) I prefer to operate this hoistby.mechanism'` .providing a yielding orldisplaceable connectionbetweenv the hoist andthe .initial oper-,

ating: gear. As here shown the hoist is ver'- tically reciprocated. by means of a connecting rod 16 pivoted thereto atitsupper end and receiving-motion from a crank disk 17 tolwhich .its lower-end is connected. This. disk1'I. is ri idly mounted onz a stubshaft. 1,8 supporte bearings v19 on the base 4'.

of thestandard-g4. A second diskf17 is 'also'inoiinted rigidl -on lthe stubfshaft'18'v tedf'to. e o erativel ,engaged;

and is yada4 projects slightly position, .a colla'r ,21 on thefboltflimiting [seen that 'in-theeventof thehoist 15 stickingthe 'spring will fyieldfand jalloi'vfthez beveled end ofthe bolt'.tojdisengagefrointhe boring.'` Theil-sprocket. wheel "20. is i drivenbyfmeans.

fgafsprocket chai'n'25. looped. thereo'vcrhand rounds the notche thereof are taken therefrom by the feeding mechanism and fed to mechanism adapted to act upon the blanks and which I term the formingpmechanism.- The improved feedingmechanism which I employ is composed of two' main parts or members one of which .v *takes the blank from the chute and delivers vmachine'"mal be of any {"'siiitablegconstruction,l vas'f-here's own com-v epi-isinf1r afbed plate 1 su In tlie embodiment o lthe invention 'here it'toi the other which in turn delivers itto the V'forming mechanism. The first of these parts consists briefiy speaking of a rotatably mounted member adapted t-o receive the blank,'and operated by suitable means to cause it to advance the blank to the desired point. In the present embodiment of my invention this part of the feeding mechanism is formed as follows: A horizontal disk V2S) (see Figs. 13, 14 and 34) is located adjacent to the lower endof the chute and has .its periphery formed with notches or recesses to receive the blanks which are de- Elivered thereto in vertical position. 'lhis disk is rigidly secured on the upper end of -a vert-ical spindle 31 rotatable in a bearing bracket 31' on the up er face of which the disk rests freely, the )racket being secured the standard 4. The disk fratchet wheel 39. rigidon the lower end of 'the spindle 31 and which is operated by a pawl 33 pivotcd to a link 34 having legs 35 which incloso the ratchet wheel and are piv- `oted thereto at one end. YThe opposite end of the link 34 is connected to a second link 36 which receives motion from a lever 37 to :one end of which it is connected, such lever -beingjfulcrumed between its ends as at 38 v*to asuitable .ing operated part of the standard 4 and .be-

y a cam 39 engaging a roller 40 in the opposite end thereof.

The blanks are retained in the notches 30, while they are being advanced by the rotation of the disk, by means of a substantially semi-circular retaining member in the form 41 which partially surperiphcry of the disk 29 and which acts in conjunction with a second member or strap 42 inwardly of and parallel to the strap 41, these straps being secured at one end to and forming a continuation of the chute 14.

of a resilient strav i The second part or member of the feeding mechanism consists briefly speaking of an oscillatory arm adapted to take the .blank from the first member and operated by suitable means'to cause it to deliver the blank to the formingnieehanism. In this embodiment of my invention this second part vof ,the feeding mechanism comprises (see particularly Figs. 7, 8, 13 and 15) an oscillatory arm 50 which oscillates from a substantiallyhorizontal position, shown in Figs-2 and 13, in which it receives the blank from thel disk 29, to a substantially vertical osition, shown in Figs. 3 and 15, in which atter position the blank is in position to'be migagenl bv the gripping device or chuck of the terminel mechanism to which further reference will be presently made. The auf-fn 5H i provided on it#y outer or treo end L h` a pilnir hill o1 which. when the arm is in tluA position shown in Fig. 13. underneath the www-etal portion of the dial( jfl and into nhirl. the rotation ot' the .flink torres the blauli. this trui being oaviliatel by a short horizontal rocker shaft 153 freely Supported in a sleeve 54 t'ornml iuhlfgrally with the standard 4. the shaft hav ingr rigidly secured t.' one cnil thereof a block 55 in which the inner end ot' the arlu 50 is revoiubly mountetl. 'lhia shaft is operated by a crank pin :37 projecting troni a disk on the end ofv the shalt and carrying a roller 5 Y" engaging; a Slot .39 in a (link "10, This dial( has a rertical boring in whit-,h is rigidly Q atrial a rod til the euri#r whereof project through the walls of a cylindrical housing; which incloses the disks and (50 and is Secured by a iet Screw 63 on the reduced end 6% oli the sleeve 54. The rod (31 reciprocatefl to o ceillate the disk 58 (through end to the lower part of the housing rofl and at its other gripper and the cam returning it.

1n order to cause the blank to be delivered to the gripping device with ita head 1n ad mure of thearm 50 no to be readil)7 engagged by the gripper the arm is also ro' taterl on its own am auhetautiallv a half turn in opposite direct ion-w it swings from one position to the other This l aecompiish by meant; of a Small bevel gear or pinion 6G rigid on arm 50 and engaging a larnjrr segmental bevel gear J7 secured by a wel screw GS on the reduced enti i9 (opposite to end 64) of the sleeve 54.

Aa will be seen by referring particularly to 3 the pinion Gti :lisengagea from the is 'mental (37 before the arm 50 has rearhed the limit' of i tlo'frnwartl swing Vwhile the gear and pimon are relatively-ao arranged as to cause the arm to have made the required half turn when the gears disengage. The purpose of this construction la lo obviate any chance ot the head of the blank striking one ot the jaws of the gripr ping,Y device which Will now be described, a eutl away portion 66 on the pinion sliding on a cutv away portion oi' the gear titl. the arm being,r limited in its; movement by a rib 67' on the The improved grippingV tlmirrr or chuck which Vl employ to hohl arti rf-*volv'e the blank while being! artctl apn-u lo' the torni ingmeans consists essentially' ot a Vwindle having a plurality ol' jaw-- pirated thereto. these jaw.`z being; operated by slilliifo' eains Y the medium oi" liek G0 and pin 5T) respectively by :u

helical spring 61 secured at onel G2,the spring moving the arm 50 qtoward the carried b v the spindle and preferably located in longitudinal grooves therein. As here shown (see particularly Figs. 1. fr 113iy J. 23 and 21) a cvlilnlrical chuck spoillle 7 n rotatably Supported in .suitable heal ng brackets 76 formed on the bed plattI l and provided with three equallv spaced autl 'adia-lly disposed slot T7 in which the ;Liip ping members or jaws 78 are located. these jaws being pivoteil on pins H() supported in the Spindle 75. Each of the jawn 7S is pror vided with an adjustable lie Hl ecureil in a radial slot 8; bv a sel srrew Si. a Second screw 83 providing y au abutment tor the rear end of the tooth. these dies bringr provided so that the gripping faces ot the jaws uiav be eawiljvv trued up Formed integrally with the jaws are rearwarlll)Y extendin arma S5. having mounted at their ends rollers; Sti adapted to be cngaged to open the jaws by means ot calm Slt) formell on the ends of reciprocating' barsl 5,11 sliilable 'ln paeaigea or boringja 92 in the spindle 7f3. these boringa communicating with and forming rearward extensiom ot the Slotsy 77 into which the enfleK of the barey 91 whirh carry the cams project. springs 9G connecting the jaws to the spindle.

When the bars are recipro :ated in the direction indicated by the arrow in Fig, 1G the jaws will close. and when reciprooated in the opposite direct-ion the .springs 9G will open the jaws. l preferir) torni the cams, as s1 own. with the part 94 thereof, which engages the roller Stwhen the ja ws are just commencing: to close with a pronounced rise to give a relatively rapid movement to the jaws while the part 95 of the cams which engages the rollers when the jawsv are nearing closed position has a relatively Small rise to cause the jaws,l to be held" firmly Closed upon the blank.

The bars 91 are operated trom a sleeve 98 slidable on the Spindle 75 and having the thickened ends 97 of the bar4 tar-:tened there to by set screws 98 or otherwise. slots 9) in the spindle accominodating the ends 97 while the bars are formed in two parte` joined together as at 91 to prruiit of their insertion in place.

The sleeve 98 is operated to open tlu` jaw:` b v an oscillatorvv lever 10() t'ilcrunied as at 101 to the inaehiue lrame an'l carrying ou one enti a roller 102 engaging in au annular groove .1055 in the sleeve. the opposite end of the lever carrying a roller 1041 engaging a double face eaux 105 on the back-shaft 27. A spring 106 encircling the Spindle 75 and bearing between a collar 107 threaded on a llangje 75' thereon and the sleeve 9H acts to rlose the jaws when the rante rlease the latter.

lu thisY embodiment ot niv invention the power by which the machine is driven applied initially to the spindle 75. I

4will therefore now describe the preferred means through which the driving power is applied thereto.

In Order to enable the machine to be quickly started and stopped, as is desirable when the parts are being adjusted to form dill'erent types or sizes of screws. I mount the starting and stopping device directly on the spindle and provide improved means for operating the same. Af, here shown (see plntieulurltv liffs. 17. 1f), E20g Q1 und 22) l. mount on the chuck spindle 75 :i

cone clutch comprising the usual tight and loose members 11() and 111 respeotlvely, the t l Y null located minut tmf ew former olf which is keyt-'l to the spindle ne :il 112 und ha@` n, sleeve extension 113 on 'which is freely mounted the loose member 111 wbieli lutter is adapted to be rotated by a` belt 114 driven from any euituble source of power. The enibt'xliutent of my iu'iprtn'etl clutch operating menne wbirh l short' here comprises :i enmll Spindle 115 journziletl in any suitable part. ol tbe machine frftuie as the brrlfet 116 bolted to one of the lwirinfgs 76. The inner @nfl of this spindle is fern l to present a disk 111`y lmving un etrr'ntrr boring 118 in which engages a stud 11%) formed on n segmental Shifter bloei; 1:0 which bears in a groove 121 in the looue member 111 the outer end of the spindle being' proriclel with u suitable knob or/hau dle 122, sulnptefi to be grasped by the op ela-ttor.

loose member 11,1 into or out of engagieuent with the light uwnibrr 110, the spindle boing vieltlingly belrl in either position bj; n lint Spriltg lQZl which "lem: freinet eit'lur one tfneeortlingr 'to llu;y position of the rmu'tA bri 111) of :i mir of flattened fares on :i diei( lill rigfitlly Geen-rml by Suitable menne :is the set screw 121' on the spindle 11.5.

. uy stumble melius tlitn iruin ot' genre 12.5 flri'ven from :t 'pinion V:zt rigid on one enti ol the dwelt spindle 75 muy be elnplojfotl to ezqfrrate tltt baekqimlit .7571

1Wbile iii@ blank i being: :utecl upon by the forming: ine'ehuniatn tbe body thereof le Supported by n :Suitable twink-rest" (wr pftrtirulnrly ltigg. Tl ne here shown Wlan-l compr s am :frm 12T pivote-tl ttlA ii'e louer enfl to tue "huw ot' tbe :stuntlurtl il :intl having a cylindrical lie 12T protitletl with a Semirirculzu'- grroo't'e rtluptetl to partially ineloee the ltoflv of the blank. The burlr. reet lr# mi'erl luto tnfrusfenunt willi the blank by un :trui 195* rfllieb neiges the brick reet through :1 linger 12%" :fuliusublv eerurefl to lt will be readily seen that the l, partial rotation ol" tlie filet( in opposite di f tlm nenti of ilu.,- blaue;

ulcrum for :i La gome ntf-cli lever 132 igitl thereon and recoit/arr motion from n. anni 133 on the baekebnl't 2T, u spring lil-l norlnatlly retaining the lever away from tbe baelr-iest.

l will now (lef/tribe the Preferred ein botliment of my iu'prfrretl means for elim'N ing the befnl of tbe blank utter the lutter has been tflelirereri, tz,- llie rliurk or gripping (levee above (tesori eti :nul by means of whrli I am enabled to Shure tbe beitel of the. blank while the lutter ie being utile-tl upon by the threading inerlizrniuin tf l 'nenne eonsie Af briefly' Speaking of n nm irtoi or fwnipri es u flut le i in this e' v ni ol un' intrnz''m ,M .lt tbe um if: shown :is-1 i'oruui t inurl eri-gui l provide tlue from o: muy: entl of lite tool.' with u, trmwi-r tuttfztgj elige lill? :nlupted to .slum 'nv tv.' tite lnunl foul u diagonal cuttiw (ulg. :.uluptwl to snare the ineltle evt fn t tbe llornl ron'in'unllt lmowu u@ tbc :imnlewunlri` portion o' be bend. This bur l f, :fliilfiblu in n groove 'l in :i tool boitier afmupriing n roll ltil loeut'erl in un nf; i 'nur 110 extending through tbe irlnu Y e :unl the pinion 126. line t ol' 'vfinirli I term abe front enti.3 is im' 'ent to tbe lr 1n enti of the mit! i, "Mpix-#ite enf ex tending to u po ture beyonfl be lguvlng tool is reur enti the Y inbred into y e 'rp-.b tbe bluulf; by suitable mtu .l rf it, imm' lll tulurmnetl ufljusubly between if i mieke: 11:2 enrriel by wie nl the, (1re ruil olf' the. lever tngat "f5-'1. teinling; :uv-wringt' tbe on@ 1 from vliet itil nor tool :muy l'rtun wiliustment of lever may be et the tulorux'zi point ol feeetl pivoting the er on the upper enrl of ity pin 1457 'n fngf through a slot 146 the bracket. 112 :nul luv-'ing threaded horizontally tlzeretluouggjx f: bolt 14"( extending.;

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ment by thi?y perforated plate 168 coicmng a recess 169 in the end 0f the rod iu which r0.- Cebxs is loomed a Collar 170 rigid on the stem; thiy lutter .ending through an axial boring in the lmlL 150, the and of the stem being provided with u Suitable knb 01' head 173 for turning it.

A Suilahle lubricanty may be supplied to the shaving tml by means (if n, lube 11M l0- Carod in n gmove 175 in the, md 13S? nd hauling from any source of lubricant supwly.

ll will he seen than. by' nunur; uf my im pxizvefl shaving 'lmice l am enabled lu hin lha Shaving! tml :ict upon ilu h ml nl ih@ blank during :i large pau-t ul the pel-lull if which lh@ latcr: i@ lwlil in the. jaws Tr@ mul l am Elma enabled tu produce- :1 screw having :i muiwlufi" :aud mow liuishiii hezul than has liwmufmv burn pohihle wiwul uuiluly invivai-,ing the time required lo produce the lm" the blank has been gripped by thf .iw. prim lo being @ugngcrl hy the Slmviug` :ix-'l lhiiiulngf nimma il wlmi upon by they painting nwihnui-#im (Hee parli-fulairly Fig@ Il :un 34: which pointu lh@ wml heiful'.

i www hv thel #lump lill. on u slide 182 i nur. im

rif-s on ihr @nd wiirh operates the arm 205. u forming com 208 which engager; the iop of :i eeler or linger 210 pivoiod as at 2l l on lle end of lho arm Q05, ThoI com 208 asis to give the required roniour to thel shank of the Scrow oi ibo bmtom of fue llorado. the icol moved along ibo blonk 3S Iwill bo preseuiy riet forth.

The opp-osito unil of the lri'or to tbm .-ai'i"'=;ing the3 block. '205 has piroially connooed tbereio a link 212 which sitx'iiddlos the back-@haft 27, being formid with an4 Slo-t 213 to accommodate the loller. This link carries on its upper end :i blorflr 214 which engages bo nob cam 21M which. latini' is in the nmin of woll known oonsiructiounrib the fill" .funi

.si-:ries of :iif'izruae anni inembms 'uol-aibn.: 2. ab Biffi, .fi spring 216 conni'rmf al' ono cnil io tho arm 21T rigi-l on the. sbalix i202 :infil :it ith: other oud to the lnafiine frame :uns to io-lil lbf; ool out of engagement with llio blank. ln orifler'to enable the noob com to be adjusted whoa rimired to properly time its action wih rriaion to the other parts of the machine, l prefer lo mount' the vom mijushibljfY on u .riiok 218 rigid on the buck shaft 2l', thu anni boing :Secured l'o Such disk by suitable means is the bolts 21S) passing througbslotn 2320 in the disk :mil screwed into tbe ram.

ln oriin' to canoe :ha block 2h! To follow the contour giieseoied by ibo periphery of tlm noti-,b :zum so that. the iooi muy be mowil ino and out, of oi'zgageuiraut with the blnnl: at ihr; proper iimo und in order that the lever 5207 in: adjusted to vary the throw of ih@ urn: prlfl'cr to mount ksuch lover as, inlioiros--i'ho bracket. :29.0 on which the lever' is fuif" unimi hns :1. pair ol au. 23' web, bovini, rim, into wlai"li lh opposite'. amig; of the fnlcruin pin L'Jai of tb@ lewprojiot. A coilo wiring; """4 in a boring 23o in u post i387 on th boil plato l ielerngiy bol r 1i boif 238 in cngjuge-mnt @oie of the lowi' und tho lui.- t .in fno .om with n wwli'q "239 loo-Mud bami-ffii il liner anni o bie-ck El() pivolorl by melanin,A of fi pin 24,! in the oppor @mia oi the arms iff. fwljuomont of ibo wedge is effected by mez-.ns of u threaded piu 242 fnwioned ut ono and to the block 240 :mil having' orrewei ilwrrona nut 143 having u grows :244. in whirl; the upturnvd bifurcaied ond of the wedge is hohl. 'lfho spring as will be readilyr seen mais bolli to bold the lever 207 in engagement. with :he wedge and to como the block 2114 lo romain in yielding Contact with tho prripnery of thrnotrb Cain.

The shaft 202 is rui'fipiforulml in n forward iiireciion to nihve Hw tool longiimliiuilly of il 1 blank b v any ysuitable moin uw ibo cuni 2:. mounted on fbi" ingilwuffr :whol- /l of ono oir' (be go, 4 bofor-f fuvnlionml. a rollvr ":oj '.:znrm l und having a port, cui' :muy n vP i: block 2M righi on :i

Lomis sliding shaft or iiivefler "154i vngnging ibo boli Qiil, whos@ origin im enel @gagna one of ihn bearings di, .iwi ibo lunffr em of 'obo boring korps die rolrr fifi in rii'iliffu' wiili filo com. 'iinf Mook 2 i in urn @Iv gagna (be unl of n, fin remlicht. sirop 5355 secured at. ibi fixpwiio ord lo :ni urn; on ilu? shaft 120;. :i milf spring 2.3i boing used to more ibs shaft in ibo opposite direction. Abolt 260 tbreafiril ibrough a lug 1201 on tho urm 205 is :idapiod to boar against one of the bearings 2023 to limit. this movement. 'l'bir vom '250 is 'oriimi in u well known man ner to vo the proper molion to 'ibo iool to out ibo ii'irerifi on line blank.

Afier tho tbronfiing operation has bron performed no 'ow is tnii'ou from tbe jaws by ai ffuitnole pini-r ont device (see par.'M ticulorly Figs. 3, 3l' and 33) which as ber@ shown, @muori-50s: o. curved rod 270 on the end of :in :lrnx :57i pivotod ai; .iis opposite omi on a Slide 272 mounted in a dovetaii guide. formed in :in extension 273 of the standard 4, tho rod being occured to the arm by suitable mm ns as; the pin F270 hav ing :i boring in which the rod is rigidly fixed, this pin in turn being secured to the arm b v the nut 1?0 screwed over the relucm om! of the pin und bearing againsttbo arm. This rod :N0 has on iis lower end :i spring bill or clip 274.- curriod by a shortA lover 275 pivoted :it to the rod 270, a retrnrlile helical spring 277 normally 100 keeping the bill pre eed against the rod. Tho arm 271 ioswung downwardly to cause the bill to seize ibo inqbeol mrow (Soos Fig. T) by moa os oi the before mentioned goose nook lever i? Ifo the mid oiE wbivb is Connected tbo ioow l, of :1. veriifzil bnr formed in wo pori; Vi und gulihd between ibo foi-lon on( z of f1 :wmp S279 cured to tbe Pori lwforo mentioned. Tho oppor port 2TH of ibo bnl ira in tlm forni of n. latch pivoted :la it 259e?. io the lower part, being` yiolrlinglv hold :iguinsii rulafive displaffeinenl oy n print ifli und boring u lmveid upper anni 25u. Thini'cl'i is notched as ot i380 ro ongugo ,fi ilzxl' com. 281 Seoul-ed to the arm T., n lowing normally retaining the pirk out, device in its raised position, .i prefer to arising-o these parts as obovo @211ml in order that when blanks of considerable lengh aro bring acted upon the iiniabed screw after boing moved longitxuiiuiiiy as will prcsenlly bo pointed out may bo lbrown quickly upward, to :moi-fl any clmucv of the following blank strikiughc same, by the Spring 282.

After the bill `274 uns seized tho blank it i4 moved in o direction longitudinally of ihr, latter und away from ibo chuck to allow the bead of ihe :www 'to @hear the jaws 78 by infuus preferably comprising n ever 290 fulcrumed between its ends as at 291 to the standard 4 and connected at one end as at 292 to the slide 272 its opposite end being connected by a link 293 to the lever 100 which operates the jaws 78.y

The connection between the link 293 and lever 100 is'madeadjustable so that when it is desired-for reasons above pointed out to have the blank'moved quickly upward the link may: be adjusted to cause the slide to move a' sufficient distance to disengage the cam 281 from the notch 280, the arm thus swinging up in advance of the bar, the spring latch on the bar rengaging the cam when the bar is moved up by the goose neck as will be readily understood.

As here shown the connection is effected (see Fig. 32) by a pin 287 rotatabl secured b v nuts 287 on the lever 100 ant passing through a slot 288 in the link, a bolt 289 being threaded through a tapped boring in the pin and swiveled in the link while the screws are released from the bill 274 by a trip in the form of a bell crank lever pivoted to an arm 295 extending upwardly from the pointer slide 182 before mentionef the arm being secured to the slide by bolts 295 passing therethrough and threaded into tapped holes 295* in the slide there being a plurality of these holes to permit of adjustment of the arm; one of the arms 296 of the lever projecting over the lever 275 before mentioned, the other 296 bein ada ted to engage (when the pointing too is a vanced) a stop 297 adjustably secured,

as by the screws 298 passing through a slot 299 therein, to the bracket 184. To receive the screws when released from the bill 274 and direct them into any suitable receptacle (not shown) I have provided a chute 305 supported on the machine by means of a i dovetail lug 306 fitting into a corresponding dovetail groove in one of the bearings 76 i the chtite preferably having one of its walls extended to form also a splash guard for the lubricant supplied to t e shaving tool. yBy mounting, as will b seen from the drawings andV foregoing description, the feeding means, back rest and pick out device upon the adjustable standard 4, I rovide a common adjusting means for t ese parts whereby they may e adjusted simultaneously when the machine is being set up for diti'erentsizes of screws.

disk is rotated l(through-ratchet wheel 32,l

i l l the gravity. As each blank reachesthe bottoni of the chute it'enters one-of the' notches` 30' in the disk 29, and is carried-around as the Operation: Thelblankslare first placedn in iopper 3 andarefed by the hoist 15 tothe chute 14 down whichthey -travel by` chuck 75, the jaws closing and gripping the blank as it reaches the position shown in Fie'. 3 and pressing it against the rod 139. While the jaws are closing the back rest commences moving toward the blank, (through arm 128, goose neck lever 132, etc.,) the back rest reaching the position in which it supports the blank after the arm 50 has started its return movement toward the disk 29. The pointing tool then advances into engagement with the blank, the pointing too being operated by the cum 39 acting through the arms 185 and 188. After the blank is pointed, and simultaneously with the action of the shavin tool it is threaded, the threading tool 200 ing moved transversely into engagement with the blank by means of the arm 205, lever 207, link 212, notch cam 20L, etc., while it is moved longitudinally ofthe blank to form the thread b v means of the cam 250,` block 253, strap 25:), arm 256 und shaft 202, the arrangement and relative rotation of' the cam 250 and the notch cani 201 whereby the tool is moved along the blank a sullicient number of times to cut the required depth of' thread being well known. During the threading operation the shaving tool remains in engagement with the head ofthe blank. After the threading is completed the shaving tool 135 and threading tool 202 move awa)v from the screw, the block 214 engaging the cut away portion of the notch cam to allow the threading tool to swing outward a sutlicient distance to permit the finished screw to be withdrawn and a new blank inserted. With the parts in this position the stra) 255 is disengaged from the block 253 (see lFig. 36) and the reci roeating motion of the tool ceases, the bo t 260 resting against the bearing 203 and retaining the shaft 202 in position to cause the strap to rengage the block when the tool is again swung inward by the notch cam 204. The pick out bill operated by means of cam 133, goose neck lever 132, etc., comes down and seizes the screw, the, jaws opening and allowing the screw to be moved by means of the slide 272 in a longitudinal direction away from the jaws 78 and then upwardly, the operation of the jaws and the slide from the same lever 141 causing the slide to move simultaneously with the opening of the jaws. As the pick out bill is moving upwardly the following 'blank is being fed to chuck by the. arm 50 and when the pointin tool moves into engagement with this b ank, the arm 296 of the bell crank lever engages the stop 29T and causes the arm 296 to engage the lever 275 and release the finished screw from the pick out bill. the screw falling into the inclined chute 305, and dropping from the latter into any suitable receptacle.

It will be seen that with the means for operating the jaws of the chuck arranged as in y e lIsdo not claim the chuck for holdin i blanks'while being acted u on, the c utch` shown the center of the chuck spindle is left free for the insertion ofthe shaving tool while the reciprocating bars, being within the periphery of the spindledo not in any way` contact with or interfere with the bearfor the latter..

for applying the power tiereto, or the means or feeding the blanksto the forming mechanism as they form the subject matter of divisional applications filed by me on June 2, 1911, under.v Serial Nos. 630,889, 630,891, and 630,890 respectively.

What I claim is as follows:-

1. A screw machine having a blank gripping chuck formed with an axial borin g u shaving tool within such boring, means tor l to cause the atter to move into enga ement i with the head of the blank in a plane aving 3 the axis of the blank lyin therein and in a direction diagonal to siici axis.

3. In a screw machine, in combination, a

1 gripping chuck formed with an axial open- 1 means for moving such tool longitudinally ing, a shavin tool within the opening,

y of the chuck, and means ada ted to be caused to operate by the longitu inal movement of the tool for imparting a diagonalmovement to the cutting face of the tool.

4. In a screw machine, in combination, a

i gripping chuck formed with an axial opening, a shaving'tool within the opening, means-for movin of the chiicla'an means acting in conjunction 'with the last mentioned means for imartin a 'diagonal movement to the working en of the tool in a plane parallel to the axis of the chuck, including a cam member located adjacent to the working end of the tool and adapted to engage the tool upon movement of the latter..y .i y,

5. In a screw machine, in combination, a gripping chuck formed with an axial opening, a rod extending'through'the said opening and having 'its periphery lon tudinally slotted,'ashaving tool su ported y the rod withinI the .said slot', an operating mecha- 3 msm for auch shavin I tool.; i 6. `In a screw machine,4in combination, a gripping chuckformed with anaxial 'openj ing, a rod extending through, the said opening, such rod having a longitudinal' groove,

the

n tudinal such tool longitudinallyy a shaving tool slldiible in the said groove, a collar encircling t-lie rod, such collar being formed with an inwardly projecting cam lug ada ted at times to engage the saidashaving too, and operating mechanism for the shaving tool.

7. In ascrew machine, in combination, a gripping chuck formed with an axial opening a rodextending through the opening, such Arod having a longitudinal groove, a shaving tool slidable in the said groove, a collar slidable u on the rod, such collar being formed wit an inwardly projecting cam lug adapted to engage the said s iaving tool, and means for adjusting such collar longitudinally of the rod.

8. In a screw machine, in combination, a gripping chuck formed with an axial opening a rod extending through the opening, such rod havin a longitudinal groove, a shaving tool sliable in the said groove, a collar slidable u )on the rod, such collar being formed witli an inwardly pro'ccting cam lug adapted to engage the said shaving tool, and means for adjusting such collar longitudinally of the rod, including a stem connected at one end to the collar, and providd with means whereby it may be operate 9. In a screw machine, in combination, a gripping chuck formed with an axial opening, a rod extending through the o ening, such rod being formed with a pair o longirooves a shaving tool slidable in one of t e sai grooves a collar slidable upon the rod such collar eing formed with an inwardly projecting cam lug adapted to at times enga e the said shaving tool and means for a justing the collar longitudinally includin a rotatable stem located in the other of tge said grooves and threaded into the collar, and means holding such stein against longitudinal movement.

10. In a screw machine, the combination with a chuck adapted to hold a screw blank, 0f a threading tool, a lever fulcrumcd between its ends, and adapted to operate the said tool in a direction transverse of the blank, means for operating the lever, and

'the lever, including an adjustable wedge in bearing relation with the lever, for the purpose set forth.

12. In a screw'machine, the combination with a chuck adapted to hold a screw blank, of a threading tool, a lever fulcrumed between its ends and adapted to operate the 

